Lubricant oil



No Drawing.

Patented Dec. 22, 1931 UNITED STATES PATENT OFFICE WILLIAM ECG-ILL, OF WRITING, INDIANA, ASSIGNOR 1'0 COMPANY,

' OI 'WH'ITING, INDIANA, A CORPORATION OF INDIANA.

LUBRICANT OIL In accordance with the present invention the cold test, pour test or equivalent inspection test of viscous hydrocarbon oils such as those used primarily for lubricating pur poses is lowered by the addition to such oils of compounds ofhydroxystearic acid from the group including hydroxystearic acid, zinc hydroxystearate and magnesium hydroxystearatb. The proportion of the hy-' droxystearic acid compound supplied is controlled in proportion to the lowering in cold or pour test desired. Ordinarily the amount rzquilred is less than 40 to grams per liter o 01 I For eziample, with a viscous hydrocarbon lubricant oil of 180 .sec. ,Saybolt (100 F.) viscosity having a pour test of 30 to 35 F., the addition of 5 grams of hydroxystearic acid or zinc hydroxystearate reduces the pour test to below 10 F. The addition of 10 grams hydroxystearic acid per liter of oil reduces the pour test to 2? R; the addition of 10 grams magnesium hydroxystearate per liter of oil reduces the cold test to 5 F. and somewhat greater reductions. in cold tests were secured by the addition of larger amounts of the hydroxystearic' acid compounds.

I claim: 7 r

1. A lubricant oil comprising a viscous hydrocarbon oil and not more than 50 grams per liter of hydroxystearic acid.

- 2 The method of lowering the pour point of a viscous hydrocarbon oil which consists in supplying therein a compound of the group consisting of hydroxy stearic acid and the zinc and magnesium compounds thereof.

3. A lubricant oil comprising a viscous hydrocarbon oil and not more than 50 grams per liter at a pear point depressing hydroxystcaric acid compound.

4. The method of lowering the pour test of viscous hydrocarbon oils which consists in oxystearic compound.

stearates.

supplying thereto a pour point reducing h Application filed novemberm, 1926; Serial No. 148,100.

5. A lubricant oil comprisin a viscous hydrocarbon oil and not more is an 50 Ins per liter of a pour point reducing by re stearic compound. 1 g; z

6. The method of reducing the pour test of viscous hydrocarbon oils :which comprises supplying therein up to 50,grams per liter of a hydroxystearic compound of the group consisting of hydroxystearic acid and the zinc and magnesium com ounds thereof.

7. The method 0 lowering the pour point of a viscous hydrocarbon oil whichcomprises supplying thereto up to 50 grams per liter of a hydroxystearic compound.

8. The method of lowering the pour point of a viscous hydrocarbon oil which comprises supplying thereto up to 50 grams per liter of hydroxystearic acid.

9. The method of lowering the pour test of a viscous hydrocarbon oil which comprises supplying therein ametallic compound of hydroxystearic acid selected from the group consisting of the zinc and magnesium soaps of hydroxystearic acid.

10. The methodof reducing the pour test of viscous hydrocarbon oils which comprises supplying-therein up to 50 grams per liter of a metallic compound of a hydroxystearic acid selected from the group consisting of the zinc and magnesium soaps of hydroxystearic acid. 11. A lubricant compound comprising a viscous hydrocarbon oil and a metallic compound of hydroxystearic acid selected from the group consisting of the zinc and magnesium soapsof hydroxystearic acid.

12. A lubricant oil comprising a viscous hydrocarbon oil and not more than 50 grams per liter of a compound selected from the group consisting of zinc and magnesium hydroxy- 13. The method-of lowerin the pourtest of a viscous hydrocarbon oil w ich comprises supplying therein zinc hydroxystearate.

14.; The method of lowerin the pour test of a viscous hydrocarbon oil wiich comprises supplying therein magnesium hydroxystearate.

15. A lubricant compound comprising a viscous hydrocarbon oil and zinc hydroxy- 5 stearate. 16. A lubricant compound comprising a viscous hydrocarbon oil and magnesium ydroxystearate.

17. A lubricant oil comprising a hydrocar- 10 bon oil and from 5 to 50 grams per liter of a pour point reducing hydroxysteario compound.

18.- A lubricating oil comprising a hydrocarbon oil and from 5 to 50 grams per liter 15 of a pour point reducing compound selected from the group consisting of hydroxystearic acid and the zinc or magnesium compound thereof. 20 WILLIAM- J. MCGILL. 

